<template>
  <el-row>
    <el-form ref="loginForm" :model="loginForm" :rules="rules" label-width="80px" class="login-box">
      <h3 class="login-title">欢迎登录</h3>
      <el-form-item label="账号" prop="username">
        <el-input type="text" placeholder="请输入用户名" v-model="loginForm.username"/>
      </el-form-item>
      <el-form-item label="密码" prop="password">
        <el-input type="password" placeholder="请输入密码" v-model="loginForm.password"/>
      </el-form-item>
      <el-form-item label="验证码" prop="code">
        <el-input style="width: 160px;float: left" placeholder="请输入验证码" v-model="loginForm.code"/>
        <el-image :src="captchaImg" class="captchaImg" @click="getCaptcha"></el-image>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" v-on:click="submitForm('loginForm')">登录</el-button>
        <el-button v-on:click="resetForm('loginForm')">重置</el-button>
      </el-form-item>
    </el-form>

    <el-dialog
        title="温馨提示"
        :visible.sync="dialogVisible"
        width="30%">
      <span>请输入账号和密码</span>
      <span slot="footer" class="dialog-footer">
        <el-button type="primary" @click="dialogVisible = false">确 定</el-button>
      </span>
    </el-dialog>
  </el-row>
</template>

<script>
import qs from "qs"
export default {
  name: "Login",
  data() {
    return {
      reData: {username: ''},
      loginForm: {
        username: '',
        password: '',
        code: '',
        token: ''
      },
      rules: {
        username: [
          {required: true, message: '用户名不能为空', trigger: 'blur'}
        ],
        password: [
          {required: true, message: '密码不能为空', trigger: 'blur'}
        ],
        code: [
          {required: true, message: '请输入验证码', trigger: 'blur'},
          {min: 5, max: 5, message: '验证码长度为 5 个字符', trigger: 'blur'}
        ]
      },
      //对话框显示和隐藏
      dialogVisible: false,

      captchaImg: null
    }
  },
  methods: {
    submitForm(formName) {
      //为表单绑定验证功能
      this.$refs[formName].validate((valid) => {
        if (valid) {
          this.$axios.post('/login?'+ qs.stringify(this.loginForm)).then(res => {
            this.$store.commit('resetState');
            const jwt = res.headers['authorization'];
            this.$store.commit('SET_TOKEN', jwt);
            this.$router.push("/index");
          });
        } else {
          this.dialogVisible = true;
          return false;
        }
      });
    },
    resetForm: function (formName) {
      this.$refs[formName].resetFields();
    },
    getCaptcha: function () {
      this.$axios.get("/captcha").then(res => {
        this.loginForm.token = res.data.data.token;
        this.captchaImg = res.data.data.captchaImg;
        this.loginForm.code = ''
      })
    }
  },
  created() {
    this.getCaptcha();
  }
}
</script>

<style scoped>

.el-row {
  height: 100vh;
}

.login-box {
  border: 1px solid #DCDFE6;
  width: 350px;
  margin: 180px auto;
  padding: 35px 35px 15px 35px;
  border-radius: 5px;
  -webkit-border-radius: 5px;
  -moz-border-radius: 5px;
  box-shadow: 0 0 25px #909399;
}

.login-title {
  text-align: center;
  margin: 0 auto 40px auto;
  color: #303133;
}

.captchaImg {
  float: left;
  margin-left: 8px;
  border-radius: 4px;
}
</style>
